Inspired by the surrealist method of exquisite corpse, this experimental film unravels the story of a Harris mud crab found perfectly preserved on the Baltic Sea shore—a creature alien to these waters until its arrival in Estonia in 2011. The crab’s journey, likely via ballast water across the Atlantic, is the entry point into a layered exploration of invasive species, their role in disrupted ecosystems, and the philosophical questions they raise about human values and environmental change. The film draws from the work of Jean Painlevé and his approach to scientific film as a form of fiction, blending surrealism with science. Its structure mirrors the fragmented, collaborative nature of an exquisite corpse, with narratives interwoven by scientists, museum workers, and educators. Together, they explore the crab’s story, the complexities of invasiveness, and the broader human-nature relationship.